Heater-Cooler System 3T • Operation
5.2 CP_IFU_16-XX-XX_USA_015
5.2 Filling the water tanks
The three tanks for the patient circuits and the cardioplegia circuit (warm/cold) are filled via the
common filler neck 3.
Note:
Pay attention to hand hygiene and protective barriers by disinfecting your hands and using disposable
gloves.
Please take note of the following information related to filling the tanks:
◗ Use filtered tap water that has been filtered by using e.g. a disposable Pall-Aquasafe water filter
with an 0.2 µm membrane (Pall part reference in the U.S.: “AQINA”; “AQIN” in other countries).
Alternatively, use a filter of equivalent performance that meets the requirements for bacterial
retention according to the ASTM standard*, i.e. which retains Brevundimonas diminuta to
≥10
7
CFU/cm
2
of effective filtration area.
* (American Standard Test Method F838-05 “Determining Bacteria Retention of Membrane Filters Utilized for Liquid
Filtration”)
Note:
!
Do not use de-ionized or reverse osmosis processed water. This water can cause deterioration on the
refrigeration system.
◗ In order to prevent microbial growth, add 150 ml (5 US fl. oz.) of medical grade 3% hydrogen
peroxide solution to the tank contents.
Note:
Medical grade 3% hydrogen peroxide solution mixed with filtered tap water at a 1:91 ratio results in a
concentration of use dilution of 1.1% (the outcome of this is a peroxide concentration of 330 ppm).
◗ Pay attention to the expiry date and storage conditions for hydrogen peroxide.
◗ If you need to refill water, pre-mix medical grade 3% hydrogen peroxide solution with filtered tap
water at a 1:91 ratio (e.g. 10 ml (0.4 US fl. oz.) hydrogen peroxide mixed with 910 ml (34 US fl. oz.)
filtered tap water). Add the mixture to the tank until the second green LED d of the water level
display for the patient circuit lights up (see illustration on page 5.4).
◗ Check the correct functioning of the water level displays when changing or disinfecting the water.
After the tank contents have been drained, the bottom segments of both displays must light up
(red).
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